The BANNER Bike Bull AGM Battery is entirely maintenance-free and completely leak-proof. Utilizing AGM (Absorbent Glass Mat) technology, it contains a glass mat inside that binds the acid, ensuring optimal performance and durability. Once filled, these batteries are sealed and must not be reopened as doing so will destroy them. This battery is especially suited for motocross, ATVs, jet skis, snowmobiles, and other similar applications.